Kamotoite-(Y) Mineral Data

Kamotoite-(Y) Mineral Data +

[New Updates] [Gallery 1] [Gallery 2] [Gallery 3] [Rock Shop Gallery]
Serving the mineral collector and educator community since 1970
Over 900,000 mineral specimens in stock
New minerals acquired weekly - Wright's Rock Shop

General Kamotoite-(Y) Information

Chemical Formula:

(Y,Nd,Gd)2U++++++4(CO3)3O12·14.5(H2O)

Composition:

Molecular Weight = 1,790.08 gm

Gadolinium 1.76 % Gd 2.03 % Gd₂O₃

Yttrium 6.46 % Y 8.20 % Y₂O₃

Uranium 53.19 % U 63.91 % UO₃

Hydrogen 1.63 % H 14.59 % H₂O

Carbon 2.01 % C 7.38 % CO₂

Neodymium 3.22 % Nd 3.76 % Nd₂O₃

Oxygen 31.73 % O

______ ______

100.00 % 99.87 % = TOTAL OXIDE

Empirical Formula:

Y_1.3Nd_0.4Gd_0.2U₄(CO₃)₃O₁₂·14.5(H₂O)

IMA Status:

Approved IMA 1986

Locality:

Kamoto, southern Shaba, Zaire. Link to MinDat.org Location Data.

Name Origin:

Named for the locality

Kamotoite-(Y) Image

Images:

Kamotoite-(Y)

Comments: Bright greenish yellow kamotoite-(Y) crystals.
Location: Kamoto mine, Kolwezi, Shaba, Democratic Republic of the Congo. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Images:

Kamotoite-(Y)

Comments: Bright yellow, feather-like kamotoite-(Y) crystal habits.
Location: Kamoto mine, Kolwezi, Shaba, Democratic Republic of the Congo. Scale: Picture size 2 cm.
© Tom Loomis / Dakota Matrix

Kamotoite-(Y) Crystallography

Axial Ratios:

a:b:c =1.6411:1:0.9582

Cell Dimensions:

a = 21.22, b = 12.93, c = 12.39, Z = 4; beta = 115.3° V = 3,073.43 Den(Calc)= 3.87

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2₁/a

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 6.48(1), 8.49(0.8), 3.054(0.6),

Physical Properties of Kamotoite-(Y)

Cleavage:

[001] Good, [010] Distinct

Color:

Yellow, Bright yellow.

Density:

3.93

Diaphaniety:

Transparent to Translucent

Habit:

Encrustations - Forms crust-like aggregates on matrix.

Luminescence:

Non-fluorescent.

Luster:

Vitreous (Glassy)

Optical Properties of Kamotoite-(Y)

Gladstone-Dale:

CI meas= -0.047 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.063 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1724,KPDmeas= 0.1698,KC= 0.1622

Optical Data:

Biaxial (-), a=1.604, b=1.667, g=1.731, bire=0.1270, 2V(Calc)=86, 2V(Meas)=87.

Calculated Properties of Kamotoite-(Y)

Electron Density:

r_electron=3.45 gm/cc
note: r_{Kamotoite-(Y)}=3.93 gm/cc.

Fermion Index

Fermion Index = 0.02299
Boson Index = 0.97701

Photoelectric:

PE_{Kamotoite-(Y)}=1,414.10 barns/electron
U=PE_{Kamotoite-(Y)} x r_electron=4,883.49 barns/cc.

Radioactivity:

GRapi = 3,988,550.33 (Gamma Ray American Petroleum Institute Units)

Kamotoite-(Y) is Radioactive as defined in 49 CFR 173.403. Greater than 70 Bq / gram.

Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 10 cm box) 7.63 ± 1.91 grams of pure Kamotoite-(Y) .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 762.60 ±190.65 grams of pure Kamotoite-(Y) .

**Estimated Radioactivity from Kamotoite-(Y)** - very strong
Specimen Size Weight/Volume (Sphere) *	Calculated Activity Bequerols (Bq)	Calculated Activity Curies (Ci)	Estimated Activity GR(api)	Estimated Exposure (mRem**)/hr If Held in Hand For One Hour
1000 gm / 7.86 cm	95,318,788	2.58E-03	3,988,550.33	1,311.30
100 gm / 3.65 cm	9,531,879	2.58E-04	398,855.03	131.13
10 gm / 1.69 cm	953,188	2.58E-05	39,885.50	13.11
1 gm / 7.86 mm	95,319	2.58E-06	3,988.55	1.31
0.1 gm / 3.65 mm	9,532	2.58E-07	398.86	0.13
0.01 gm / 1.69 mm	953	2.58E-08	39.89	0.01
0.001 gm / 0.79 mm	95	2.58E-09	3.99	0.00

Weight of pure Kamotoite-(Y) in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.93 gm/cc.*
Goverment Estimate of Average Annual Exposure ( 360 mRem) **
Note: 10 microsieverts/hr = 1 mRem/hr **
Max Permissable Adult Dose 50,000 mRem/yr (hands), 15,000 mRem/yr (eyes)
Lethal Dose LD(50) Exposure 400,000 to 500,000 mRem
Estimated Thorium Activity ( 0.25 % Th) From Sum REE Elements ( 4.98 % REE)

Kamotoite-(Y) Classification

Dana Class:

16b.3.3.1 (16b)Carbonates - Hydroxyl or Halogen

(16b.3)where Am Bn (XO3)p Zq · x(H2O), (m+n):p = 2:1

(16b.3.3)Dana Group

16b.3.3.1 Kamotoite-(Y) (Y,Nd,Gd)2U4(CO3)3O12·14.5(H2O) P 2₁/a 2/m

Strunz Class:

V/F.06-20 V - Nitrates, Carbonates and Borates

V/F - Uranylcarbonates ([UO2]4+ - [CO3]2-)

V/F.06 - Astrocyanite-(Ce) - Bijvoetite-(Y) series

V/F.06-05 Astrocyanite-(Ce) Cu2(Ce,Nd,La)2(UO2)(CO3)5(OH)2·1.5(H2O) P 6/mmm 6/m 2/m 2/m

V/F.06-10 Shabaite-(Nd) Ca(Nd,Sm,Y)2(UO2)(CO3)4(OH)2·6(H2O) P 2,P 2/m,Pm Mono

V/F.06-20 Kamotoite-(Y) (Y,Nd,Gd)2U4(CO3)3O12·14.5(H2O) P 2₁/a 2/m

V/F.06-30 Bijvoetite-(Y) (Y,REE)8(H2O)25(UO2)16O8(OH)8(CO3)16·14(H2O) B1211 (pseudo ORTHO) 2

Other Kamotoite-(Y) Information

References:

PHYS. PROP.(Bull.Miner.,Vol.107-111,1984-1988) OPTIC PROP.(Bull.Miner.,Vol.107-111,1984-1988)

See Also:

Links to other databases for Kamotoite-(Y) :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas

Search for Kamotoite-(Y) using:

[ALTAVISTA] [AOL] [About.com] [All-The-Web] [HotBot] [Ixquick] [LookSmart] [MAMMA] [MSN.COM] [Netscape] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Kamotoite-(Y) :
AA Mineral Specimens
B and L Minerals
Dan Weinrich Fine Minerals
Dan Weinrich Auctions
e-Rocks Auctions
Excalibur Minerals
Exceptional Minerals
Fabre Minerals
Greenside Minerals
John Betts Fine Minerals
Masons Minerals
Minernet.it
Mineral News
Mineral of the Month Club
MineralsWeb Fine Minerals
Rockshop.cz Kalat Fine Minerals
T G Fine Minerals
Wrights Rock Shop

Translate Kamotoite-(Y) Mineral Data :

Ask about Kamotoite-(Y) here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

Print or Cut-and-Paste your Kamotoite-(Y) Specimen Label here :

Kamotoite-(Y)

(Y,Nd,Gd)2U++++++4(CO3)3O12·14.5(H2O)
Dana No: 16b.3.3.1 Strunz No: V/F.06-20
Locality:

Notes: